All notable changes to the HUB75 LED Matrix Driver will be documented in this file.
Check Keep a Changelog for reminders on how to structure this file. Also, note that our version numbering adheres to Semantic Versioning.
Pages: README | Hardware Turn-on | Driver Details | Change Log
Work to appear in upcoming releases:
- Fix multi-panel support for chips that are not yet working in multi-panel form
- I've even some fun animated clocks coming (sorry, I'm been doing software clocks of many, many, forms for a long time.)
- Morphing digits Matrix displays can be found at P2 LED-Matrix Morphing Digits Repository.
- Add support for panels using DP5125D chips
- Add Chips' 5x7 dithered fonts
- ICN2037_B was renamed to ICN2038S
- MBI5124_8S was renamed to MBI5124GP
- Rearranged user configurable files in order to improve compilation under Pnut/Propeller Tool - This allows us to support many more total pixels (now 64k) in a display.
- Multi-panel support for the MBI5124 driver chips is not yet working!
- The driver is now fast enough now that there are slight display issues with panels using the MBI5124 chips. We're looking into this.
- Convert initialization: enable support for up to three hub75 cards!
- Rename demos (now all start with demo_)
- Add new demos:
demo_hub75_5x7font.spin2anddemo_hub75_scroll.spin2 - Upgrade scrolling, now supports scroll directions:
up, down, left, right - Added support for New Panel (same chip as ICN2037 but slightly different setttings, new name is: ICN2037_B*: where colors are not swapped and scan is different*)
- Repo README's have been updated: changed demo file names, changed how configuration is done.
- Multi-panel support for the FM6126A and MBI5124 driver chips is not yet working!
- The driver is now fast enough now that there are slight display issues with panels using the MBI5124 chips. We're looking into this.
- Converted to new PWM generation mechanism allowing compile-time selection of desired display color depth of 3-bit to 8-bit/color (9 to 24bit RGB)
- Now uses 25% of RAM required by previous version for same 4-bit color depth.
- Frees up ~300kB RAM for our P2 P2 Cube Application
- Latest timing and memory usage info posted.
NOTE SW0 means our older v0.x drivers, while SW1 means our new v1.x driver!
- Multi-panel support for the FM6126A and MBI5124 driver chips is not yet working!
- The driver is now fast enough now that there are slight display issues with panels using the MBI5124 chips. We're looking into this.
- The driver now works with multiple 64x64 panels using ICN_2037 Chips organized as 1 row. (The P2 P2 Cube is one row with top and bottom panels being the panels at either end of the row.)
- Multi-panel support for the FM6126A and MBI5124 driver chips is not yet working!
- The driver is now fast enough now that there are slight display issues with panels using the MBI5124 chips. We're looking into this.
- Driver rebuilt to work with maximum display width of 1024 pixels.
- Driver now works with new 64x64 panel using ICN_2037 Chips
- Driver now works with display of 128x64 using twin 64x64 panels in series.
- Driver now supports 1/8 scan panels (P4-1921-8S-V2.0) using the MBI5124 driver chips
- Multi-panel support for the FM6126A and MBI5124 driver chips is not yet working!
- Single panel support working well, up to 2048 leds (64x32)
- PWM'ing images to achieve reasonable color
- Displaying text in both 5x7 and 8x8 fonts
- Initial version of scrolling text - will get more performant in future updates
- Basic color pixel placement at row, column
- Basic drawing primitives
- Loading and displaying images from .bmp files (that are identically sized to your panel)
30 Nov 2020: After being distracted by designing and sourcing the Eval Adapter boards I'm finally working on the driver once again.
- rundimentary scrolling text is now working
- multiple panel types are now supported (will add more as users identify the need)
26 Nov 2020: v1.4 PCB order placed for production run.
16 Nov 2020: v1.3 (green) PCB's arrived today these are better mechanical fit and have plated vias on the EVal board connectors. This is a final form and function run before we go to production.
20 Oct 2020: I've made wonderful advances in this past week.
Things now working are:
- Loading and displaying images from .bmp files
- PWMing images to achieve reasonable color (initial draft)
- Displaying text in both 5x7 and 8x8 fonts
Here you can see a demonstration of the 16-bit pwm color. Of course these panels are amazingly bright. I'm running here at ~50% brightness and it's still overwhelming the camera in a lighted room.
27 Oct 2020: More engineering and the (red) boards arrive!
This week I've been:
- Working to formally structure the code for release
- Studied gamma correction and now have a better performing table in place
- Studied PWM for the LEDs and now have a much more accurate PWM in place (colors are looking much better)
- Have been working on more tests, demos for animation rates of display
- More videos will be coming, meanwhile, have you seen these? YouTube Playlist for Propeller Related Videos
- Exciting! The initial run of the Adapter PCBs arrived!
- I checked them out mechanically, soldered the parts to one, then checked it out electrically and lastly started using it! It came up beautifully! (See pictures and turn on description below)